cheaper is sometimes from lower-quality, but don't discount the effect of economies of scale. Every doubling of production volume reduces cost by ~30%. For exam

cheaper is sometimes from lower-quality, but don't discount the effect of economies of scale. Every doubling of production volume reduces cost by ~30%. For example, Tesla thinks it's gigafactory will reduce the cost of their battery pack by ~30%, because that one factory will double global battery production. The same thing is happening to solar panels. As production sykrockets, prices plummet.